Nut-lock.



No. 684,360. Patented Oct. 8, l90l. C. EBERHABT.

NUT LOCK.

(Application fllod In. 28, 1901.)

(No Model.)

4o plication of the invention.

the nut.

UNITED STATES PATENT OFFICE.

CHRISTIAN EBERHART, OF FOND DU LAO, \VISCONSIN.

NUT-LOCK.

SPECIFICATION formingpart of Letters Patent No. 684,360, dated October8, 1901.

Application filed March 28, 1901. Serial No. 53,273. (No model.)

[O the art to which it appertains to make and use the same.

This invention has relation to means for preventing the loosening of anut, tap, or bur after the same has been screwed home upon :5 a belt oranalogous fastening; and in its construction the nut-lock comprises awasher adapted to slip loosely upon the bolt and provided with means tointerlock with the part through which the bolt passes, said washer ashaving a cleft or space extending outwardly from the bolt-opening andhaving in its outer face a curved depression intersecting the said cleftand adapted to receive a lockingspring the free end of which is turnedout ward to engage with one of a series of notches or depressions formedin the inner face of the nut or tap.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result reference is to be had to the following descriptionand drawings hereto attached.

While the essential and characteristic fea- 3 5 tures of the inventionare necessarily susceptible of modification, still the preferredembodiment of the invention is illustrated in the accompanying drawings,in which-'- Figure l is a detail View showing the ap- Fig. 2 is a frontview of the washer with the interlocking spring in position. Fig. 3 is aperspective view of the washer, the locking-spring being removed. Fig. 4is a view of the rear side of Fig. 5 is a detail perspective view of thelocking-spring.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The bolt 1 and nut 2 are of ordinary construction, with the exceptionthat a circular series of notches or depressions 3 are formed in theinner face or side of the nut concentric with the bolt-opening, saidnotches or depressions being beveled or inclined at one side tofacilitate the riding of the nut upon the outturned end 4 of thelocking-spring 5 when screwing the nut or bur home upon the bolt.

The washer 6 is adapted to move freely upon the threaded portion of thebolt 1 and is provided in one side with a cleft or space 7, extendingoutward from the bolt-opening,

and is formed with a rear extension 8 to enter an opening in the part 9,against which the washer is clamped by the nut or bur 2, so as toprevent rotation thereof. A curved seat or channel 10 is formed in theouter face of the Washer 6 to receive the locking-spring 5, and thischannel intersects with the cleft or space 7 and is deepest at thispoint and gradually diminishes in depth toward the opposite end, whichis formed on a tangent, as shown at 1] and is of a depth to admit of theattaching end of the locking-spring being clamped in the part 11 of theseat by means of the nut 2. By having the cleft or space 7 locatedadjacent to the outturned end 4 of the locking-spring an instrument maybe inserted between the inner face of the nut 2 and the locking-spring,so as to release the nut and admit of its re moval, the releasing beingeffected by with drawing the outturned end from the notch or depression3, in which it is fitted when the nut is turned up tight against theouter face of the washer.

The locking-spring 5 conforms to the outline of the channel or curvedseat 10 and consists of a length of spring-wire of suitable gage, oneend being bent outward, as shown at 4, to interlock with the notches ordepresopposite end portion of gradually-decreasing depth and terminatingin a tangential portion, alocking-spring fitted in the said curvedchannel and having one end outturned and having its opposite end bentand fitted into an opening in the Washer extending from the tangentialportion of the curved seat or chan nel, the outturned end of thelocking-spring being adapted to engage with one of a series of notchesor depressions formed in the inner face of the nut concentric with theopening thereof, substantially as set forth.

2. In a nut-lock, and in combination with thebolt and a nut having acircular series of notches or depressions formed in its inner face, awasher having a rear extension and having a cleft or space extendingoutward from the bolt-opening and provided in its outer face with acurved seat or channel intersecting the said cleft at one end and havingthe opposite end portion gradually decreasing in depth and formed on atangent,

and a curved locking-spring located in the

